The Secret Service has banned truck traffic on Washington's 17th Street along the White House complex, Reuters reported.

Street signs announced the ban along an eight-block stretch and authorities confirmed the Secret Service was imposing it to guard against potential truck bombs.

The agency also barred unauthorized vehicles from parking on a four-block section of 17th Street along the Eisenhower Executive Office Building, which is next to the White House inside the executive complex.

Authorities described the measures as a "regular enhancement" to security and said they were not in response to a specific threat or linked to the Sept. 11 anniversary.